Safety Relief Valve RL25

The RL25 is a 1/4” ported relief valve. Designed for emergency relief applications, it may be used to protect systems up to 1,379 bar (20,000 psi). The valve is a proportional metering style relief valve, and is approved as a safety accessory to category IV of the Pressure Equipment Directive, enabling its use in the most demanding applications.

Available in Stock, Contact our sales at [email protected]

Approved to category IV of the Pressure Equipment

Directive (2014/68/EU)

Available preset via internal adjustment or with an

external handwheel adjustment option

Wire locking and tagging available on request

Minimal leakage at 90% of set pressure

Reseat within 20% of set pressure

Repeatabily within ±5% of set pressure

Suitable for subsea use (excluding handwheel version)

Suitable for use with mineral oils and water glycols, with

options for water and sea water duty

Suitable for many other media, contact us for advice

Available in many other materials




Max Working Pressure

1,379 bar



Fluid: Liquid



Port Size – 1/4’’



0.9 KG (2.0 lb)



Externally Exposed Parts:

316 stainless steel. The handwheel version contains other 300 series stainless steels.


Internally Wetted Parts:

316 and 302 stainless steel. The seat and ball are 440C stainless steel and silicon nitride respectively. The water duty version contains a 17-4 PH stainless steel seat. The sea water duty valve uses only 316 stainless steel, inconel and silicon nitride in wetted areas. Note that use with water above 100°C is not recommended.